full_adder_v2.c

void full_adder(int a, int b, int c, int *sum, int *carry) {
    int test = ((a == 1) << 2 | (b == 1) << 1 | (c == 1));

    switch (test) {
        case 0:
            *carry = 0;
            *sum = 0;
            break;
        case 1:
            *carry = 0;
            *sum = 1;
            break;
        case 2:
            *carry = 0;
            *sum = 1;
            break;
        case 3:
            *carry = 1;
            *sum = 0;
            break;
        case 4:
            *carry = 0;
            *sum = 1;
            break;
        case 5:
            *carry = 1;
            *sum = 0;
            break;
        case 6:
            *carry = 1;
            *sum = 0;
            break;
        case 7:
            *carry = 1;
            *sum = 1;
            break;
    }
}